Thermostatic gas cut-off for water-heaters.



B. E. MEACHAM.

THERMOSTATIC GAS CUT-OFF FOR WATER HEATERS.

APPLICATION FILED MAR.14,1911.

L1 US$72, Patented Aug". 25, 1914;.

BENJ'filiIIN E. MEACHA itppiieatiiz-i To all 'ZU/(Oill may, cmwern it known that 812mm: (inn, a citizen of the United Stw'e ing' at Lorain, in the coun y of State of Ohio, have invented. and useful improvements (:iRS Cutiiiis tor-Vi' eteT-H V e following is a specification,

had therein to the eecoinpen J"- idy invention relates to improvein" thermostatic gas out-oflis for wzter hea rlhc object of my invention is to pro\ we 11 cut-oil of this character which wilt auto niaticiilly, h thern'mistutie n ezrns out--05 the gas; supply to the heater when the water in the heiiter-heo reached thin temp ture, whereby the wo'ler in t1 tl in iow'ed to cool and, after it l' eient y cooled the gas mg: 1L turned oi. to hring the water up to the c red temperw ture.

Another ohjeet of my in. 11 is to pro Vide means "whereby the den the gins ily changed to cut on at temperatures o the w" de ills ol striict forth.

In the accompanying drawings Fi is :i verticui etional View of in ii cut-01f. Fig. 2 is; a horizon view taken on the line .4; I is; 1 horizontal trantverse eecti the line Fig. 1,

ftieterring now to the d1 rent 1 repre ts the boiler or wetter. receptacle of a heater which provided with a burner sup plied with gas, and my inniroved cut-off is dro w ing,

:uhrpted to out off he from said burner. The said receptacle is provided with screw-thremled opening; 2 into which is screwed the elongated housing which is nrei'erihly ot'r. cylindricei tr-ion" and him me its inner end interneliy socow-threaded and into which is screwed the copper exvending tube 4, which extends within the wuter oi the receptacle and is expanded by the heat thereon. Screwed within the inner end of the tube is a plug 5, which is pro rider} with n screw-threaded reeeas 6 into which screwed the negative expanding rod T which extends o'utxwrdly through the l'ioiisin z 3,

The outer end of the housingfi is elosed r read- N, OHIO, ASSIGNOB. T0 AMERICAN STOVE COMPANY,

A CORPORATION ()F NEVJ JERSEY.

C CUT-01" 3361i; WATERPHEATERS.

an elongated bearing for the GU11 end of the rod 7 The rod 7', as shown, extends through the opening and beyond the inner Wall 11 of the housin 9.

Tihe'housing 9, as shown, is of u rectanform 213 shown in 3 of the drawand provided with an upper open end closed by the screw-cap 1:2. Pivo'ted zit iii,

a lever 14-. which is adapted to swing in he housing in the same direction 21 the z The rod '1 us said lever or, in other words, the ever normally held in engagement with the said rod. in order to hold the lever in engagement with the rod, I provide 21 cylindrical lwusing 17 in which is pluce a coiled wpring it The inner end of the spring engages the lever i, and. the outer rnd it c or plug 17 screwed within the housing rahand whereby the tension or" the s n-in on the lever may he Varied hy screw- 1 inn" the n: g 17 in or out (lSlIt.(l. ine

lower eni of the housing 9 has formed thereto and ii conm'umicutiou therewltln a horihaving the raised vulx e shot '21.

Within the housing 18' is a cylindrical piston 22, which extends through on open-- ing 23 in the web 2i of the housing. and er:- icndn within the vulve-ciieing 20. The outer end of the piston is provided with :1 valve 25 which is adapted to seat itseltu pon :i sent, 21 and close the oon'in'uinicution he tween the space 26. connected to the god supplppipe 2 4, for the burner and thespuce 2b connected with the pipe 29 leading from the gas supply, The said piston is pro- Yided with a vertical elongated slot. 3i) into which extends the lever 11in Within the outer end of the slot 30 is a trip lever n11,

pivoted at 32, and which has an upwardly curved finger 33 which engages the lower end of the lever 1i, and moves the some with the piston as it is moved toward the iett. The piston 22 is provided with e rod within the {w per end of the housing 50 or" the plug 38, and the 3 1,1os,77e

I .the vision is reduced and surroundin the same is a SlQQVl against which the coiled spring: 17 hear and ormally holds the valve close. The l we is longitudinally movable upon the pison and has .its inner end enthe trip lever 31, and holding it H1O lever 141-, as shovvn in Fig. 1. On the forward movement of the piston the (mg "ment of 'lhele-vcr 3:1, With the plug 38 moves the sleeve upon thefiston against the s; spring and allows the lever to swing down- Wa rdly.

As Will be readily seen the rod 7 normally extends out sulliciently to hold the lever 14- in such a positoin that the piston 22 is held as against "the tension of the spring 37 and the valve held unseated so that. there is a lull liow of gas from the pipe 2!) to the pipe 27. The expansion of the metal of the tube it, will more the rod 7, so that the lever 14 2: may move to the left and thus allowing the piston 22 to move to the left so that the gas valve is closed. This cuts oil the gas from the burner and thus the Water in the tank or receptacle l. begins to cool. This con so tracts the tube 4 and forces the rod '4 outwardly moving the lever It to the right, which carries with it the piston 22, carrying the valve and allows the gas to again enter the burners. This, as readilv unders5 stood, compresses the spring 37 and the lever and trip lever are held in position shown. in Fig. 1.

In. order to release the trip lever 31 so that the engagement between it and the lever 14, will be released, I provide the housing 18 with 'a plug 38, screwed into the flange 39 and the same closed by a cover 40.

The upper end of said plug is conically' shaped and is in the path of travel of the 4 5 downwardlyextending arm 41 integral with the trip lever 81. From this itwill be seen that as the rod 7 moves inwardly and they lever 14 forced over lay-the springs 16 and 37, the arrntl engag the conical. end id. arm is forced rlowmvardly so that the pmtion 38 is below thelever l t and thus uncut oling this lever 14% from thepiston 22, whereby the lever moves independently of tlie piston. and upon the tube 1- contracting, the outward move ment of the rod Will move the lever 14 'out- 'iva-rdly, hut the same being disconnected from the giston -22, the valve 25 Will remain upon the seat and the gas remain cut 6 oil and the valve will have to he opened by hand. In order to again couple the lever 1 -and the piston 22 together, I rovide a screw 1-2 which strikes the bevele face 43 of the trip lever and forces it u so'thut 6 the end 33 is brought up in rear 0 the lever and the same held by friction. The plug 38h; removed or screwed down so as not to engage the arm 41 of the trip lever when it desired that the valve be opened and closed by the lever 14 the movement of which has been heretofore described. On the rod 7, Il'place a regulating nut lip, whereby the movement of the rod 7 isrcgulated for the purpose heretofore described. The valvelcase 2'0 is-provided vvith a screw valve l-hovlrich controls an opening 46, which al.- lOWS for the passage of a small amount of to be fed to the pilot burner. The outer end of said screw is covered by a cap 4.? to prevent the escape of gas, I

Having thus described my inventim, what I claim and desire to secure by Letters Patcut is:

1. An automatic gas cut-oil, comprising av valve normally spring-closed, a pivoted lever engaging the valve, alatch for locking the lever to the valve, and thermostatic means for controlling the lever and means for releasing the latch by the closing oi. the valve.

2. An automatic gas cut-oi".comprising a valve no mally spring closed, a latch for locking the valve open, thermostatic means engaging the latch for controlling the said valve and means for releasing the latch by the closing of the valve. 4

8. An automatic gas cut-oil comprising a valve, normally spring closed, a latch for valve normally spring closed, a valve stem carried by the valve and having a l-opening therethrough, a pivoted lever adapted to pass into the openlng 1n the stem, thermostatic means for controlling said lever, a

latch carried by the stem for locking the lever in the stem, and means for releasing the latch by the closing of the valve, in

which unlatched position the valve may be opened independent of the lever.

automatic gas-cutout;comprising a valve normally spring closed, a-pivoted lever engagingthe valve, a. latch for looking the lever to the valve, thermostatic means for controlling the lever,-a'nd means for to leasin the latch by the closinget'the valve, in which unlatched position the" vulve may be opened independent of theleve'r. I

' drAnaiitomatic gas c'ut-out, comprising free izo

seine normal y Spring,clerwlf"a Pivotal leverengaging the valve," a latch for looking the lever to Qthe, valve, thermostatic means for controlling'the lever, means for releasing the latch bythe closing of the valve, in which unlatched position the valve may he opened independent ofthe lever and aoawe means for closing the latch by the opening valve.

7. An automatic gaseut-ofi for heaters,v

comprising a housing connected to the heater, a valve in the housing, a valve stem carriedhy the valve, a spring engaging the stem and normally holding the same closed, a lever pivoted in the housing and extending at right angles to the valve stem and having its lower end entering said stem, a rod eX- tending at right angles to the lever and engaging the same, thermostatic means moving said rod, and means whereby the lever may be disconnected from the valve stem so that the lever may move independent of the valve stem.

8. An automatic gas-cutoff for heaters, comprising a housing connected to the heater, a va ve in said housing, a valve stem carried by the valve, a spring engaging the stem and normally holdingthe valve closed, a lever pivoted in the housing and extending at right angles to the valve stem and having its lower end entering said stem, a rod extending at right angles to the lever and engaging the same and holding the valve open against the tension of the spring, thermostatic means for moving the rod inwardly to allow the lever to move and the valve to seat, and automatic means caused by the closing movement of the valve for disconnccting'the valve stem from the lever, whereby the valve will remain closed.

9. An automatic gas-cut-ofl for heaters, comprising a housing connected to the heater, a valve in said housing, a valve stem carried by the valve, a spring engaging the stem and normally holding the valve closed, a hand operating-means for said valve, a. lever pivoted at its upper end within the housing and extending at right angles to the valve stem, and having its lower end entering an elongated slot in the valve stem, a spring holding the lever inwardly, a rod cn 'ina the lever intermediate its ends,

thermostatic means for moving the rod in- .vardlv to allow the lever to move and the valve to seat, a trip lever-within -the slot in the stem and engaging the lever and locking the stem to the lever, av downwardly extending! arm carried by the trip lover, a movahliprojection in the housing engaging the arm ol" the trip lever and moving the same doxvn'wardly to disconnect the lever and valve stem, and adjustable means ihtlie casing and adapted to engage the trip lever and move it upwardly to connect the,stem and lrvr by the movement of the stem to lhe right by the hanil-operating mechanism.

10. in automatic gas-rut-oll' lor' heaters, l-om n'is-ing a housing cunmirted to the heater. a valve in said housing. a vtlvo stem carried by the valve. trip lever pivoted within the piston, a lever extending through the piston and locked thereto by the trip lever, a. sleeve sliding upon the piston and engaging the trip lover, a. spring surrounding the valve stem and normally holding the valve close and holding the slee e against the trip lever to hold it in engagement with the lever, movable projection in the house ing and engaging an arm carried by the trip lever, and thermostatic m ans connected to the lever whereby the valve opened or closed.

11. An automatic gas cut-oil, comprising a valve, a spring for normally holding the valve closed, a valve stem, a lever, a trip lever carried by the valve stem connecting the lever to the valve stem, and thermostatic means for operating said lever.

12. An automatic gas outed, comprising a valve, a spring for normally holding the valve closed, a lever, a trip-lever carried by the valve stem connecting the lever to the valve, and thermostatic means for operating said lever.

An automatic gas cut-oil, comprising a valve, a spring for closing the valve, a valve stem, a. lover, a trip lever carried. by the valve stem connecting the lever to the valve stem, and a thermostatic means for moving the lever in one direction for opening the valve against the tension of the spring.

1- in automatic gas cut-out, comprising a valve, a valve stem having a slot therethrough, a lever having one end entering said slot, means within the slot for coupling the lever to the valve stem, and thermostatic means for operating said lever.

15. An automatic gas cut out, comprising a valve, a valve stem having a slot theretlnrough, a lever having one end extending into said slot, means for coupling the said lever to the stem within the slot, means operated by the n'iovement of the stern uncoupling said coupling means, and thermostatic means for operating said rod.

16. An automatic gas cut-out, comprising a valve, a valve stem having a slot-therethrough, a lever having one end evtending into said slot, a trip-lever ithin the slot for holding the lever against movement in the slot in one direrl'ion, means for releasing said. trip lever hy the moven'ient of the stem in one direction, means for operating the le ver in one direction, and means for moving the trip lever to its norm 1 coupled position by the-movement of the stem in the opposite direction, and thermostatic means for moving the lever.

11. An automatic gas cut-out, connirising a valve, a valve stein, having a slot therethrongh a spring action on the stem for closing the valve, hand means" carried by the outer end oi? the valve stem for opening the valve against the action ofth 1 pring, a lover having'one end extending into the slot in the valve stem, a trip lever within the siot in the sixsm for balding the movement in the 05; in we dircw fur releasing "1; have: by i; nuwenmnt of the I 4 mo ving the trip 1am in its up by the movement elf 0 valve the tension of the sprmg .15 t vl ating'means, and thmfmosiiasfii 

